| 摘要 |
PROBLEM TO BE SOLVED: To prevent a contact ellipse of a track groove and a ball from protruding even if high torque is applied while a spherical outer circumference surface of an inner ring and a ball contact center are close to each other. SOLUTION: In the constant velocity universal joint consisting of an outer ring provided with a plurality of track grooves extending in a shaft direction in a cylindrical inner circumference surface, the inner ring 11 provided with a plurality of track grooves 16 extending in the shaft direction in the spherical outer circumference surface, the ball 13 for transmitting torque by interposing between the track groove of the outer ring and the track groove 16 of the inner ring 11 and a cage interposing between the cylindrical inner circumference surface of the outer ring and the spherical outer circumference surface of the inner ring 11 and holding the ball 13, a ball contact angleβat both end positions of the track groove 16 of the inner ring 11 in the shaft direction is smaller than a ball contact angleαat a center position in the shaft direction. COPYRIGHT: (C)2007,JPO&INPIT
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